Recently, a 4-year-old girl Tongtong (pseudonym) was rushed to the hospital because of abdominal pain and vomiting blood. On inspection, it was found that there were goose egg-sized gastric stones in Tongtong’s stomach. This turned out to be the “disaster” of eating 6 pieces of dried persimmon on an empty stomach. Professor Huang Ying, director of the Department of Gastroenterology, Pediatric Hospital Affiliated to Fudan University, said that persimmons or persimmon cakes contain a lot of tannic acid (also called tannin), and when they encounter acidic substances, especially gastric acid, the protein in the food will be denatured and the food and residues will be denatured. Combined into a group, that is, persimmon stone. The longer it is in the stomach, the firmer the clumps will form. Huang Ying said, do not eat persimmons or persimmons on an empty stomach, and do not eat too much each time; do not eat persimmons or dried persimmons with acidic fruits or seafood; do not drink milk after eating persimmons.